AGP/PCI clock

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Archived from groups: alt.comp.hardware.overclocking.amd (More info?)

How far (low) can I go from stock 66/33 Mhz?
Is it better/safer
lower (ex. 60/30), or higher (ex. 70/40)?

The reason why I ask this is because I have a VIA KT600 based mbo (PC3200
RAM), and I just can't overclock my Barton 2500 , by raising the FSB and
Vcore (starting from 166 MHz, at FSB:RAM 1:1 ratio,
Vcore up to 1,825V). It won't get stable probably because the AGP/PCI is to
high.
So... i thought maybe I could raise the FSBCI:AGP ratio to 6:2:1 (stock
5:2:1) and set the
FSB at 190-195 MHz and Vcore to 1,8V so the AGP/PCI clock would be lower
then stock 66/33 MHz,
but it also wont get stable.
I tried FSB 200 MHz, RAM at 200 MHz (since it is PC3200), Vcore at
1,8V.....also nothing.

I saw some people unlock their CPU multiplier by closing L5 bridges, but I
too afraid of damageing the CPU.

Maybe I just can't overclock and thats it.
Can enyone help?


---------------------------------------------
Abit KV7 VIA KT600
AMD Barton 2500+ (locked multipl.)

CPU-Z:
Slot#1:
RAM 256 MB PC3200 (KingMax SuperRam)
latency: 133 MHz 2-3-3-6
200 MHz 2.5-4-4-8
Slot#2:
RAM 256 MB PC3200 (Jade Star)
latency: 133 MHz 2-2-2-6
166 MHz 2.5-3-3-7
200 MHz 3-3-3-8

 

[Guest]

Archived from groups: alt.comp.hardware.overclocking.amd (More info?)

> How far (low) can I go from stock 66/33 Mhz?
> Is it better/safer
> lower (ex. 60/30), or higher (ex. 70/40)?

It's impossible to answer that question, it
highly depends on your hardware. A few MHz
shouldn't be a problem. You could try to
remove some extension cards in order to see
which one is making trouble.

>
> The reason why I ask this is because I have a VIA KT600 based mbo (PC3200
> RAM), and I just can't overclock my Barton 2500 , by raising the FSB and
> Vcore (starting from 166 MHz, at FSB:RAM 1:1 ratio,
> Vcore up to 1,825V). It won't get stable probably because the AGP/PCI is to
> high.

Good boy STOP! This VCore is crazy for a first
try. I have such a feeling that you increase
the voltage so much, that you CPU cooler can't
take it any more.
Please check your CPU and System temperatures.
The cooler your processor runs the higher you
can go.


> I saw some people unlock their CPU multiplier by closing L5 bridges,
but I
> too afraid of damageing the CPU.

Unlocking an Barton can be quite tricky, but
with enough patience and ...


Some basic rules:
Always change the settings a little, never
increase the VCore or de FSB by such
values at once.
For example my Barton 2600+ runs at 3400+
(thats 2300 MHz) with aircooling at
1000RPM and an VCore of 1,675V

 

[Guest]

Archived from groups: alt.comp.hardware.overclocking.amd (More info?)

On Thu, 10 Feb 2005 21:17:09 +0100, Schumm33 wrote:

> How far (low) can I go from stock 66/33 Mhz? Is it better/safer
> lower (ex. 60/30), or higher (ex. 70/40)?
>
Much safer to go lower. BTW, you can't get 70/40, you can get 70/35, or
80/40. Although 80/40 is likely not to work.

> The reason why I ask this is because I have a VIA KT600 based mbo
> (PC3200 RAM), and I just can't overclock my Barton 2500 , by raising the
> FSB and Vcore (starting from 166 MHz, at FSB:RAM 1:1 ratio, Vcore up to
> 1,825V). It won't get stable probably because the AGP/PCI is to high.
> So... i thought maybe I could raise the FSBCI:AGP ratio to 6:2:1
> (stock 5:2:1) and set the FSB at 190-195 MHz and Vcore to 1,8V so the
> AGP/PCI clock would be lower then stock 66/33 MHz, but it also wont get
> stable. I tried FSB 200 MHz, RAM at 200 MHz (since it is PC3200), Vcore
> at 1,8V.....also nothing.
>
You want the ratio of 6:2:1 for anything over about 175MHZ FSB.
You will probably need to set your ram manaully since you have 2 different
ones. You need to use the timings from the slowest one. And the FSB will
also overclock your ram if you don't keep it on 33Mhz boundaries.

> --------------------------------------------- Abit KV7 VIA KT600 AMD
> Barton 2500+ (locked multipl.)
>
> CPU-Z:
> Slot#1:
> RAM 256 MB PC3200 (KingMax SuperRam)
> latency: 133 MHz 2-3-3-6
> 200 MHz 2.5-4-4-8
> Slot#2:
> RAM 256 MB PC3200 (Jade Star)
> latency: 133 MHz 2-2-2-6
> 166 MHz 2.5-3-3-7
> 200 MHz 3-3-3-8

Maunally set ram to 3-4-4-8 (combo of slowest numbers between the 2 ram).
Set ratio to 6:2:1. Set FSB to 200. Set vcore max to 1.85 to start with.
Reboot. Once running tweak your settings.

--
Abit KT7-Raid (KT133) Tbred B core CPU @2400MHz (24x100FSB)
My server http://wesnewell.no-ip.com/cpu.htm
Verizon server http://mysite.verizon.net/res0exft/cpu.htm

 

[Guest]

Archived from groups: alt.comp.hardware.overclocking.amd (More info?)

I got it stable at FSB 192 MHz Vcore 1.825V, RAM 8-4-4-3@200MHz (FSB:RAM
1:1)
Temp.: (after half hour watching TV on PC (100% CPU usage))
Program what i got with mbo ABITEQ says CPU temp 55 degC
but CBID (Central Brain Identifier) says CPU temp 61 degC

Which is more true?

THANX